Neurospine.
2021 Mar;18(1):117-125. 10.14245/ns.2040424.212.
Development of Neuromonitoring Pedicle Screw - Results of Electrical Resistance and Neurophysiologic Test in Pig Model
- Affiliations
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- 1Department of Neurosurgery, Topspine Hospital, Daegu, Korea
- 2Department of Electrical Engineering, Kyungpook National University, Daegu, Korea
- 3Department of Neurosurgery, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu, Korea
- 4Department of Orthopedic surgery, Columbia University Medical Center/New York Presbyterian Hospital, New York, NY, USA
- 5Department of Rehabilitation Medicine, Chung-Ang University College of Medicine, Seoul, Korea
- 6Department of Neurosurgery, CHA Bundang Medical Center, CHA University, Seongnam, Korea
- 7Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam, Korea
- 8Department of Neurosurgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
- 9Department of Neurosurgery, Chung-Ang University College of Medicine, Seoul, Korea
- KMID: 2514294
- DOI: http://doi.org/10.14245/ns.2040424.212
Abstract
Objective
To analyze the electrical resistance of a newly developed neuromonitoring pedicle screw (Neuro-PS) and to verify the electrophysiologic properties of the Neuro-PS in a pig model.
Methods
We developed 2 types of the Neuro-PS in which a gold lead was located internally (type I) and externally (type II). We measured the electrical resistance of the Neuro-PS and the conventional screw and analyzed the electrical thresholds of triggered EMG (t-EMG) of each screw by intentionally penetrating the medial pedicle wall and contacting the exiting nerve root in a pig model.
Results
The electrical resistances of the Neuro-PS were remarkably lower than that of the conventional screw. In electrophysiologic testing, only the type II Neuro-PS under the leadnerve contact condition showed a significantly lower stimulation threshold as compared to the conventional screw.
Conclusion
The Neuro-PS demonstrated lower electrical resistances than the conventional screw. The type II Neuro-PS under the lead-nerve contact condition showed a significantly lower stimulation threshold compared to that of the other screws in the t-EMG test.
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